Mechanical movement.



A. L. SANDELS.

MECHANICAL MOVEMENT.

APPLICATION FILED MAR. 9, 1917- Patented Feb. 4, 1919.

2 SHEETS-SHEET 1.

Patanted Feb. 4 1919 2 SHEETSSHEET 2.

AXEL L. SANDELS, CHICAGO, ILLINOIS.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented Feb. 4, 1919.

Application filed March 9. 1917. Serial No. 153.655.

Be it known that I. AXnL L. Saxnnns, sub-' King of Sweden, residing at(hicago, in the. county of (ook and State of Illinois, have inventedcertain new and useful Improvements in Mechanical Movements; and I dohereby declare the following to be a full, clear, and exact. descriptionof-the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to improvements in mechanism for vibratingscreens, particu larly of the type for screening coal and the like, butwhich is adaptable for screens for all purposes.

The object of the invention is to provide a novel mechanism forimparting to a set of screens a rta-iprocatory motion variable in speedwhereby to effectconveyance of the material longiti'idii'ially of thescreen over portions of gradually increasing mesh without the aid ofadditional conveying means.

A further object of the invention is to provide mechanism forreciprocating a screen and conveyor, or a multiplicity of screens at avariable speed, in which the screens move siniultal'ieously in oppositedirections at variable speed whereby to balance or partially balance thestrains and stresses on the ilCtlh ating mechanism:

further object of the invention is to provide mechanism for vibrating orreciprocating screens and the like, at variable speed. in which thestrokes of the screen at high and low speeds respectively, may beadjusted and varied as desired to provide maximum efficiency ofoperation.

The invention consists in the features of constructi m and conroinatkmsof parts hereinafter fully described and particularly claimed.

In the accompanying drawings illustrating a suitable embodiment of myinvention.

Figure -l is a view in side elevation of a coal;screening apparatusconstructed in accordance with the invention.

Fig. 2 is a fragmentary top plan view of the same.

Fig. -3 is a view in plan section partly in elevation showing themechanism for operating the variousscreen members, said view beingsubstantially diagrammatic.

Fig. -l is a similar fragmentary section through the completedmotioil-transmitting mechanism.

ject of the Fig. -fi is a vertical longitudinal section ofthe same onthe line 5 5 of Fig.

Fig. (i is a detail vertical longitudinal section showing the relativepositions of the three eccentrics driven at'varia blc speeds forsimultaneously imparting variable speed to three. elements.

Figs. T- and are fragmentary detail diagrammatic views illustrating theditl'erence in direction of feed occasioned by changing the position ofthe actuating eccentrics relatively to the cranks rigid therewith andconnected to the source of power or drive-shaft actuating saideccentrics.

Fig. '!lis a diagrammatic view showing the various positions of the linkconnecting the disks during one revolution of the same.

In carrying out my invention, I make use of a well-known mechanism ormechanical movement for transforming uniform rotary n'lovement. of oneelement into variable movement of another member geared thereto by meansof a crank on the actuating member connectedwith the actuated memher bymeans of a link or pitman which, gencrally, is very short. and. duringrotation of the crank, becomes positioned at various an gles relative tothe driven member of the plane of movement thereof. whereby the latteris moved at a speed varied in accordance with the. variations orditi'erences in angles .of disposition of the link or pitman.

lnthe present invention the. uniform motion of the drive-shaft is firsttransmitted. as hereinafter fully described, to countershafts, and fromthe latter to the reciprocating elements for varying the speed ofreciprocation of the latter and simultaneously eil'ecting movementthereof in respectively opposite directions.

Referring now to the drawings, 1 in'licates a drive-shaft suitablygeared to'a source of power as, for example, by means of the pulley 2.lhe said drive-shaft is provided at one end with two diametricallyopposed equal crank arms'3 each equipped with a crank pin.

Disposed axially parallel with and eccentric to the drive-shaft, 1 is asolid countershaft 4. and a hollow counter-shaft 5, the lat ter beingmounted on the shaft l, and being rotatable relatively to the latter onthe same axis. The shaft -1 is provided with a crankarm 6, and the.shaft 5 with a crank'arm 7,

each of the latter being equipped. with. a crank pin having its axisdisposed coin-dis" tantly from the axis of the shaft fl and pref--ora'bly also spaced radially as far from the axis of the shaft 2 as thecrank pins of the crank arms 3 are spaced from the axis of the shaft 1.The spacing of the axes of the shafts 1 and 4 with respect to each otheris less than the radial dist-mice of any one of. the crank pins from theaxis of rotation of the shaft with which it rigid. A link 8 connects oneof the crank pins of the arm 3 with the crank pin of the arm 6 of theshaft 4 and a similar link 9 connects the other crank pin of the urin 3will: the craukpin of "l in, 7 of the shaft Tho low links 8 and 9 will:respect to the tween on een'lers of the openinor, i gaging "l activecrank pins n alao gamer .an the distance sepia fling axes o rotation ofthe afts 1 and s and pint-l1 eralily equal lo the rm l'inl din-fiance ofeach oranir pin friun llli axis of 3T1i32ll3l0fl of the shaft with whichit in rigid.

The result of this arrangement grannnabically illustri .-:l in F W asdis out upon the, disi'anee between centers of shifts Il and (l. l'frouithisit will be observed ohm, lz-he rounteosha'l' ianal 5 will rotate :2av variable speed, and that earn thereof will al'tuli'a its greatest;speed of: rotation substantially at :9. time that the other thereof hasattained its lea weed. This due to the footthat the crank pins of" thearm E.- of the shaft 1 are diaim-trieally oppositely disposed. and onthe assumption thatthe woven-- tries ll? am ll] of 'I'llu sluifls; &-andv 5 am din posed so that the longcr zl: radius of each from the axisof rotation is coincident. with the radius intersecting the crank pinaxis of said shafts 4. and shaft 4 is connected by means of an eccentricrod 12 and eccentric strap 13 with tho upper or screen member 1% of thecoal screen or the like, adapted to be actuated by the mechanism, andthe eccentric ll. of the shaft 5 is simil: .rly connected by means ofthe ercei'itrie rod 15 and eccentric strap 16 with the other or conveyormember 17, shown in Fig. -1--, it bring obvious, of course. that eitherof said eccentrics may be interki changeably connected with said members14 and 17. Another ecrrnt-ric 18 on. the shaft 4' 4 -,l1haf; (lurlng'the half revolution of the lllil'fl} 1- The eccentric ll) of the v n'll'l wuinh adapted to be fed longitudinally of; the mei'nbors 'l-l and17 and led into The cars or other meepmeles 23 diinn'isrd bolmv themember In. {Lu-aeolian the member 14; is provided with a foraminonsbottom, wall or foraminous portions, in said bottom wall, as indicatedat and rcss 'ieetirely, the perforation in the portion El beingcomparatively small so as to separate all of (be very line particlesfrom lbe mazes of coal or other material. fed upon the screens, and thepoi} for liionrs the no ion beioglarger to wed lumps from the i orlarger lunnn; pinning Jr of the memlrr illnpon the of l ne member 1'11and Moi-- tli'er int") the farthlrsl; lelt 7 il Ti niomller 1', n,olir'i nlatlnrni'or with gal d or lllli'nliflll Wlliiili 1 lb? liorlioull. weigh Ybe porlion "lively. are adapted to Que l'l 'flif-lh 'bil rewrincles; l in of lnis panrhion of rho an z'iarains coiidngul'ing nopart. of tho inesient inx'oxuiou.

.he :frr-d member 21 is reciproczdcxl for tweened l nn-prim of foulingcoal or other material lo be act-owed upon the member M material to hethrown always in one dircc of said illtllllllfl'I-l, and irahln loinorwlbem loof' motion beginning relali y 'l with, r' ":mlly in- EITHER:0 an in attain uubslan lially maximum npceil as the forward limit ofmovement is rrarhc-ib the rrtxurn move ment beginning "very rapidly andgradually deeelorating whereby the supporting surface for (be coalpartially withdrawn from momma the luttor so that it, does not, travelback with the said members, but retains an advanced position thereon.and is thus gradually moved from end to end thereof, at the same timebeing agitated sufficiently to efl'eot the sifting or scrcrning lionlongitndiiml lo 1 1 lii-rii: :lo

- desired.

8 and 17.

I posed at an angle of substantially thirtyfive degrees more or less. tothe horizontal plane of reciprocation of the members It The variation ofthis angle will change the point inv the travel of the members 14 and 17respectively. at which said members attain their respective maximumspeeds and minimum speeds. This may fur L ther be changed by varying theposition of the eccentrics on said shafts with respect to thecrank-radii thereof. Thus. as shown in Figs. T and -8+- if thelongestradius of the eccentric of one of said shafts is dis 15 posed toextendcoincident-ally and in the same direction as the crank pin radiusthereofrthe coal or other matter disposed on the .member It or 17 gearedto said eccentric will be fed in the direction of the arrow in 20 Fig.7, whereas. if said eccentric is turned through an arc of one hundredand eighty degrees. as shown in Fig. 8-. the coal or other matter willbe fed in the direction of the arrow in Fig. 8. By turning the eccentricof either one of said shafts on the axis thereof relatively to thecrankpin radius thereof it will be obvious that the point in the strokeof the reciprocating member connected with said. eccentric at 80 whichsaid reciprocating member attains its maximum speed will be similarlyvaried. The relative positions of crank pins and eccentrics illustratedin Figs. -1- t0 6- inclusive, and the relative positions of the 36 axesof the shafts 1 and t therein shown are 40 the material deposited on themembers 14 and 17, nor to produce the greatest degree of balancingeffect on the shafts 1, at and 5 so as to minimize the strains on thelatter for increasing the life of the mechanism, as

i5 it will be obvious that this may be readily.

determined by experiment. The balancing effect produced obviates thenecessity of mounting the driving element on as heavy foundations aswould be necessary were the action of the mechanism not balanced; or

partially balanced.

t will be'obvious. of course, that my invention is adapted to many usesbesides that of screening, and may be changed and varied to particularlyadapt it 'to any desired purpose without departing from the invention asdefined 1n the appended claims.

I claim as my invention:

7 1. In an apparatus ofthe kind specified, a i 60 pair of screensadapted .to bereciprocated,

and means foretfecting reciprocation thereof comprising a counter-shafthaving two diametrically opposed eccentrics connected with saidrespective screens, a cranlepin on 85 said counter-shaft, a 'drivoshafthavingja crank-pin radially equi-distant from'its axis with the crankpin of said countershaft. and axially offset from said counter-shaft adistance less than the distance of said crank Pins from the. axes oftheir shafts. a link of greater length than the distance between theaxes of said shafts connecting said crank-pins. the crank-rmlius oione'of said eccentrics on said counter-shaft being); coincidental withits crank-pin radius. a plane common to both shaft axes being inclinedto the direction of reciprocation of said screens. whereby the latterare simultaneously reciprm-attal at variable speeds in oppositedirections.

2. In an apparatus of the kind specified, a pair of reciproeablcscreens, a drive-shaft. having a crank-pin, a countershaft parallel withand offset from said drive-shaft a distance less than the crank-rmliusof the latter. a crank on the countershaft having a radius equal to thatof the crank of the drive-shaft. a link of greater length than thedistance separating, the axes of said shafts connecting said crank pinsa plane connnon to both shaft axes being inclined to the direction ofreciln'ocation of said screens. and connection between said screens andsaid countershaft for reciprocating the latter simultaneously inopposite directions, said connection includingan eccentric on saidcountershat't having its longest radius coincident with its crank-pinradius.

3. In an apparatus of the kind specified, a drive-shaft having twocranks, two countershafts disposed axially parallel with and eccentricto said drive. shaft and each having a crank, a link of greater lengththan the distance sepa 'atingz the axes of rotation of the shaftsconnecting each of the counter-shafts with a' crank of the drive-shaftfor imparting variable rotary speed to said respective counter-shafts.two relatively re ciprocable members operatively engaged with saidrespective counter-shafts for causing each of the same to move morerapidly in one direction than the other, andto move simultaneously inopposite directions at respectively different speeds. v

- 4. In an apparatus of the kind specified, a drive-shaft havingdiametrically opposed crank-pins, two counter-shafts disposed one withinthe other and each having a crankpin, the axis of said counter-shaftsbeing eccentric to the axis of said drive-shaft, and links of greaterlength than the distance separatin said axes connecting the respectivecran-pi-ns of said counter-shafts with the respective crank-pins of saiddrive-shaft, an eccentric on' each of said counter-shafts, .and a pairof reciprocable members operatively-connected with said respectiveeccentrics. 3

5. In ah apparatus of the kindspecified,

.a pair of relatively reciprocable members, a

- end, two countersliafts disposed one within the other and each havinga crank-pin at one end, said counter-shafts eccentric to said driveshaftand connectedwith the latter by means of links connecting the crank-pinsthereof with the crank-pins of said driveshaft, said links-of greaterlength than the distance separating the axes of said drive andcounter-shafts, the latter disposed substantiallyin the plane ofreciprocation of said members, and said driveshaft disposed so that aplane common to the several axes of said shafts will be an'gularlydisposed relatively to the plane of reciprocation of said members, aneccentric on each ofthe counter-shaftslhaving its'longest radius in theradial plane of the crank-pin of said shaft. and eccentric rodsconnecting said-rel spective members with said respective counter-shafts6. In an apparatus of the kind specified, a pair of relativelyreciprocable members,

a drive-shaft having two diametrically opposed cranlcpins at one end,two countershaits disposed one within the other and each having acrnnlc-pin at one end, said counter-shafts eccentric to said drive-shaltthe crank-pins of said drive-shaft, said, links being equal and ofgreater length than the distance separating the axes of said drive andconntershafts, the letter disposed substantially in the plane ofreciprocation of said members, and said drive-shaft disposed so that aplane common to the several axes of said shafts will be angulnrlydisposed relatively to the plane of reciprocation of:

said members, an eccentric on each of the connter-shaits having itslongest radius 1n the radial plane of the erenlepin or said shaft, andeccentric rods connecting said D6 spective members with. said respectivecomrter-shafts.

In testimony whereof I have signed r in presence of two SllbSCI'llllDgmi.

- AXEL Lt" SANDELS. VVitn esses M. M. BorLn, J; Cl Bnsenerr.

I bosses.

